Tire pump



J. FIESE.

TlRE PUMP.

APPLICATION HLED oc. 27. |919.

- Patented May 2, 1922..

IN VEN TOR. Jes@ Tikes? JESSE T. E TESE, OIE FRESNO,

TRE PUT?.

isiiasoe.

Specification of Letters Patent. l

CALFORNIA.

Patented May 2, 1922,

To all whom t may concern.' Y

Be it known that l, lJnssr. T,v Finse, a citij/:en of the United States, residing at Fresno, county of Fresno, State of California, have invented, certain new and useful Improvements -in Tire Pumps; and l do declare 'the following to be a full. clear, and exact description of the same. reference being had to the accompanying drawings, and to the characters Aof reference marked thereon, which form a part of this application.

This invention relates to manually or mechanically operated tire pumps, and is intended to incorporate certain features of improvement over Letters Patent No. 1,301,242 issued to me the 22nd day of Jipril, 1919.

The principal features of improvement in my present form of pumpl are mainly in the plunger mechanism, the main object of the invention being to so construct the said our. mecianism a Vti re wi e a plunge l th t le ll b positive expansion of the leather plungercup on the ldownward or force stroke.

On the upward or suction stroke this eX- pansive pressure is relieved, thus keeping the cup from contact with the sides of the pump barrel, and so prolonging the life of the cup, since the wear eiiec-t due to friction only occurs during one stroke.

This freedom from contact of the cup with the barrel during the suction stroke also permits a' free and unobstructed passage of air past the plunger, and therefore lessens the physical exertion necessary to operate the pump.

The parts of the plunger mechanism are so arranged as -to permit of great ease of assembly thereof, and allow the main wearing cup to be quickly replaced if necessary.

ln the majority of pumps having leather cup plungers. if the pumpl has been idle for any length of time, theleather becomes dried out, and the effectiveness of the pump is lostuntil a new cup can be supplied.

`With my improved form of construction, this will seldom if ever be necessary, since as before stated, as soon as the downward stroke of the pump is begun, the cup is positively expanded.

A further object of the invention is to produce a. simple and inexpensive device,

and yet one which will be exceedingly effective'for the purposes for which it is designed.

Riese objects l accomplish by means of such structure and relative arrangement of parts as will fully appear by a perusal of the following specification and claims.

In the drawings similar characters of reference indicate corresponding parts in the several views.

Fig. l is a side elevation of the pump, partly in section to show the plunger mechanism, the pump rod being on the upward stroke.

Fig. 2 is a fragmentary section through the plunger, showing the pump rod on the downward stroke.

Fig. 3 is aA bottom plan view lof the plunger.

Referring now more partic'ularly to the characters of reference onk the drawings the numeral l denotes a foot; plate, `2A the pump base, and3 the barrel screwed into the base. rlhe base is preferably secured to the foot plate in. themanner set forth in my cepending application for patent'Serial No; 333,355 filed Oct. 27, 1919.

The base 2 is provided with an upstanding nipple 4 to one side of the barrel and communicates therewith through the base, being adapted for connection to a tube or hose. A. ball check 5 is positioned in the nipple to prevent pressure or suction therethrough from the hose to the barrel.

A pump or piston rod 6 extends. into 'the barrel, Yand is slidable 'through a closure plug .7 on ltop of the barrel, the construc-v tion of. the closure being -preferably the same as that shown in the above mentioned Letters Patent.

A handle 8 is ofcourse secured to the rod above the plug?.

@n the lower end of thel rod is mounted my improved piston or plunger mechanism. This comprises an inverted leather cup 9, normally spaced slightly from the sides of the pump barrel. The horizontal portion of this cup is braced by metelwashers l0 on each side. A nut 11 is threaded on the rod 6 above the upper washer, while oa spacer sleeve 12 is on the rod below the under washer, which spacer is held against the washer by a sleeve nul: member 13, the nut portion of which is or' larger diameer 'than the sleeve. i

i] his construcion 'the cup 9 is lirmly held in place, while et the same time it may be readily removed when necessary.

Slidehle a ily on the sleeve 1.2 is a disc 14 having perforeions theretirough. This disc i slighly smaller at iis lower end than `he barrel, and tapers somewhat to its upper end as at if? 'that such upper edge is always just l-.side the inner edge of the cup 9.

in inverted leaher cup 1T adep-'red "uo bear always againsv Jche barrel is held against the lower face of the disc by means oi' a wiisher 1S, the disc having' an extension 19 projecting past he washer7 which exension is then Aheeded over on io the 'washer so chat it cannot be displaced.

vSince this letler cup has no function other than 12o hold 'the disc momentarily stawhen ehe rod is pushed downwardsj in ell probabili'ey neyer need res in alignment with 'che holes 15 in the cisf', and che laster is slipped over the sleeve before screwing Athe nui 13 ono the rod.

.in the opera'rion of the pump.) an upward sroire of the pump rod, es shown in l sllows the air in Jche barrel above the rlunger to pass the cup 9. when it ihen disc, 18.

eessed `ihre/ugh Jche holes 15 in the he disc then resting on the lower nue reversing the motion of the rod 6,'

the disc is momenarily held stationary hy she clinging action oi the cup 1'? against the barrel. This causes 'the disc *no enrer the upper cup 9, end the tapered edge of the dise will caus enp to be expended and firmly impinged against he walls of the barrel.

is soon as the air in vhe barrel is sv ed slie'htlyu 2his force is then suly hold lihe disc agaiusv the Lai/reos as do noi; form a departure from the spirit of V*che invension, as delined by the appended' claims.

Having thus described my invention what l claim as new and useful and desire to secure by'Letters Patent is z- 1. A piston mechanism for pumps including an expansible cup fixed on the piston rod und normally spaced slightly from the walls of valie pump-barrel, a disc below the cup and adapted to expand the same, he disc hemg arranged i'or limited sliding moyelmen;` of a predet rmined eXtenI on the rod, another cup lixed to die disc and bearing constantly against the walls ci' the barrel, said letter cup and the disc being oriiCed, whereby when the rod is moved upwardly on the suction stroke the eXpansible cup is drawn away rom the disc and air may pass thereeround and through the orices, but when `the rod is pushed down on iis pressure stroke the expansible cup will be forced agains' the walls of the barrel and the air passageways are stopped up.

2. A pison mechanism 'for tire pumps including a leaher cup mouned on the piston rod of Jdie pump, and normally spaced slighly from the walls or" the pump barrel, a disc on the rod below the cup and arranged for limited vertical movement` relative thereto, 'the disc tapering inwardly toward the cup and being substantially the same dian'ieier es said cup, and another leather cup secured to ihe disc and bearing constantly instl Jdie nails oi the pump hai-rel.7 the and' up thereon being perforated to admin air therethrough during `che suction srole of he piston rod.

3. A piston mechanism for pumps including a piston rod, a ixed expansihle cup thereon normally spaced slightly from the walls of "she piunp-barrel7 another cup helow the first named cup bearing constantly egainn 4die barrel-walls and arranged for limited vertical movement on the rod, said hiel; named cup having oriiices through 'that poriou which ertendsecross vthe barrel, end means wherebywl'xen rod is forced down on the pressure stroke the expansible cup will be .lforcedinto close conta with Jche barrel walls.

in testimony ywhereof I efliX my signature in presence of two witnesses.

JESSE T. FESE.

llVitnesses:

CARL G. SrsENnYj G. N. NUTWLL. 

